<?php
/**
 * CCodeFile class file.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright 2008-2013 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

/**
 * CCodeFile represents a code file being generated.
 *
 * @property string $relativePath The code file path relative to the application base path.
 * @property string $type The code file extension (e.g. php, txt).
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @package system.gii
 * @since 1.1.2
 */
class CCodeFile extends CComponent
{
    const OP_NEW = 'new';
    const OP_OVERWRITE = 'overwrite';
    const OP_SKIP = 'skip';

    /**
     * @var string the file path that the new code should be saved to.
     */
    public $path;
    /**
     * @var mixed the newly generated code. If this is null, it means {@link path}
     * should be treated as a directory.
     */
    public $content;
    /**
     * @var string the operation to be performed
     */
    public $operation;
    /**
     * @var string the error occurred when saving the code into a file
     */
    public $error;

    /**
     * Constructor.
     * @param string $path the file path that the new code should be saved to.
     * @param string $content the newly generated code
     */
    public function __construct($path, $content)
    {
        $this->path = strtr($path, array('/' => DIRECTORY_SEPARATOR, '\\' => DIRECTORY_SEPARATOR));
        $this->content = $content;
        if (is_file($path))
            $this->operation = file_get_contents($path) === $content ? self::OP_SKIP : self::OP_OVERWRITE;
        elseif ($content === null) // is dir
            $this->operation = is_dir($path) ? self::OP_SKIP : self::OP_NEW;
        else
            $this->operation = self::OP_NEW;
    }

    /**
     * Saves the code into the file {@link path}.
     */
    public function save()
    {
        $module = Yii::app()->controller->module;
        if ($this->content === null) // a directory
        {
            if (!is_dir($this->path)) {
                $oldmask = @umask(0);
                $result = @mkdir($this->path, $module->newDirMode, true);
                @umask($oldmask);
                if (!$result) {
                    $this->error = "Unable to create the directory '{$this->path}'.";
                    return false;
                }
            }
            return true;
        }

        if ($this->operation === self::OP_NEW) {
            $dir = dirname($this->path);
            if (!is_dir($dir)) {
                $oldmask = @umask(0);
                $result = @mkdir($dir, $module->newDirMode, true);
                @umask($oldmask);
                if (!$result) {
                    $this->error = "Unable to create the directory '$dir'.";
                    return false;
                }
            }
        }
        if (@file_put_contents($this->path, $this->content) === false) {
            $this->error = "Unable to write the file '{$this->path}'.";
            return false;
        } else {
            $oldmask = @umask(0);
            @chmod($this->path, $module->newFileMode);
            @umask($oldmask);
        }
        return true;
    }

    /**
     * @return string the code file path relative to the application base path.
     */
    public function getRelativePath()
    {
        if (strpos($this->path, Yii::app()->basePath) === 0)
            return substr($this->path, strlen(Yii::app()->basePath) + 1);
        else
            return $this->path;
    }

    /**
     * @return string the code file extension (e.g. php, txt)
     */
    public function getType()
    {
        if (($pos = strrpos($this->path, '.')) !== false)
            return substr($this->path, $pos + 1);
        else
            return 'unknown';
    }
}